The Emperor Penguin (Aptenodytes forsteri) is the tallest and heaviest of all living penguin species. It is endemic to Antarctica, and is the only penguin species that breeds during the Antarctic winter. Emperor Penguins mainly eat crustaceans (such as krill) but also occasionally take small fish and squid. In the wild, Emperor Penguins typically live for 20 years, but some records indicate a maximum lifespan of around 40 years.